Auditorium Building, Chicago

The Auditorium Building has been a major historic landmark of Chicago since 1890. Back then, architects Dankmar Adler and Louis Sullivan created a hotel, several offices and the wonderful Auditorium Theater inside this masterpiece construction—the building was considered the world's eighth wonder when it first opened its doors to the public. Although the structure stood independently since it took shape, it is a part of the Roosevelt University today and is preserved by the university's authorities—a number of literary events, music shows and educational forums are held at the Auditorium.